Esca-something

"So, Selah," I asked, "which name do you like best? Sequoia, Tahoe, Yukon or Escalade?"

"Oh, Escalade," she declared.

"Really? Why?" I asked.

"Because it goes up and down," she answered.

It took me a minute. As all things do these days. Ah! Escalade. Escalator. What's the difference?